Pulverizing-machine



(No Model.)

J. J. BORDMAN. PULVBRIZING MACHINE.

Patented Dec. 3,y 1889.

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UNITED STATES PATENT OFFICE.

JOHN J. BORDMAN, OF BROOKLYN, NEIV YORK.

PULVERIZING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 416,253, dated December3, 1889.

Application filed July 5, 1888- Serial No. 279,0117% (No model.) i i .Toall whom t may concern/:-

Be it known that I, JOHN J. BORDMAN, a citizen of the United States, anda resident of Brooklyn, Kings county, and State of New York, haveinvented certain new and useful Improvements in Pulverizing-lvlachines,of which the following is a specification.

My invention relates to improvements in machines for reducing andpulverizing all varieties of substances, and especially to that class ofmachines which are provided interiorly with rotary fans and beaters foraecomplishing the pulverizing, and to the balancing or adjusting of theshafts which in Ysaid machines are employed for carrying the beaters andfans. In machines of this character the shaft which is employed forcarrying the beaters and fans rotates at ya very high rate of speed, itnot being 'unusual at times tov drive the shaft at a speed of twothousand or more revolutions per minute. Where the shoes or flatsurfaces of the ybeaters or the fan-blades become unequally worn in theoperation of pulverizing, the center of gravity of the whole system willbe displaced, because it does not coincide with the center of rotation,and the effect will be to impede and retard the rotation of the shaft bycausing lateral vibration, and thereby increasing the friction on thebearings and subjecting all parts of the machine to a very much greaterstrain than when the shaft is properly balanced.

The object of the present improvement is to provide means for obviatingt-hese difficulties by eifecting an immediate balance of the shaft ofthe machine at any desired moment.

The invention will be best understood by reference to the accompanyingsheet of drawings, in which Figures 1 to 8 show the devices forbalancing. Fig. l is a side elevation of the machine partlyin section;Fig. 2, an end View of the same; Fig. 3, a sectional view of the devicesfor raising the driving-shaft while being balanced; Figs. 4 and 5, viewsof the balancing devices, and Figs. 6, 7, and S views of details of thebearings. Y

Similar letters refer to similar parts throughout the several views.

In the drawings, A A2 is the outer shell of the machine, the same beingmade in two horizontal sections--a lower section A2, supported on thebent standards S S, and an upper section A', fitting upon the lowersection-hinged together and capable of being opened, the end walls ofthe machine being parallel. The sections A and ,A2 are provided with thehorizontall iianges, designated, respectively, in the drawings by e e',for facilitating the opening and closing of the Lipper section, as shownin Fig. 2.

E is the central driving-shaft of the machine, which passes through theopenings F F in the parallel end walls of the machine, which openingsare just large enough to admit of the passage of the saine, and issupported on the bearings B2 B2, Fig. l, carried upon the brackets B B,which are cast on or otherwise attached to the end walls of the machine.

Fig. 2 shows two of the radial arms of the beaters I I, which areattached to the shaft E, and are shown with their extremities brokenoff.

The brackets B B are provided with a cylindrical sleeve B cast in onepiece therewith, in which the vertical standards D are placed and whichserve as bearings in which the same slide. These standards can bevertically raised or lowered by means of the beveled collar D', whichencircles the same, as shown, and is bolted to the lower portion of thestandard D. rlhestandards rest in sockets in the flat extremities of thelegs S, as shown in Fig. l, and have sufficient vertical play to enablethem to be raised a short distance, and they are prevented from turningby the peg s, passing through them and resting in the slots s. Beneaththe sleeve is placed a second sleeve D2, with a beveled upper head uponwhich the beveled edge of the .sleeve D rests when the shaft E islowered,

IOO

rollers lirmly until released by turning back the lever-arm D".

Any convenient form of device for rotating` or moving the sleeves in aybe used; but in' practice the lever-arm D, Figs. 'l and 3, will be foundmost convenient.

The upper extremities of the vertical standards D are provided each withtwo frictionwheels m m, mounted on the V-shaped arms m', and thearrangement of the vertical standards is such that they will comedirectly under the center of the driving-shaft E, as shown in Fig. 2.

The arrangement of the two inclined surfaces of the collars D and D2 issuch that they will meet in an inclined plane, as shown in Figs. l andAs the collar D'is securely fastened to the vertical shaft D, when thecollar D2 is rotated from left to right the collar D',and with it thestandard D, will be raised in its socket and the wheels m m brought inContact with the shaft E, which, when the upper half of the shell A isopened, may be raised from the bearings l5 bl and also from the openingin the end walls.

For the purpose of effecting the balance of the driving-shaft, aparticular form of driving-pulley P P is used, containing within it anynumber or any arrangement of adjustable weights, but preferably two,arranged as shown.

P represents the portion of the pulley which comes in contact with thebelt, and P represents the portion containing the weights, which latterportion is ot' greater diameter than the former.

The peculiar construction of the pulley is shown in Figs. ft and 5. 1tis cast of metal in a single piece, and contains a central hub E', whichis keyed to the driving-shaft E by the key The enlarged portion containsparallel webs pi p, which serve to form grooves within which the weightsp p can slide from one edge of the periphery to the other. Thecenterline of both the weights is the same distance above the centerline of the driving shaft when the pulley is being adjusted and the websforming the grooves placed in a horizontal position, as shown in Fig. 1.

Adjusting screws p2 are provided with screw-heads p p, passing throughopenings on the periphery of the enlarged portion of the pulley andthrough screw-threaded openings in the weights p 11', and by turning'the screwheads of these adjusting-screws the weights are caused totravel from side to side in their grooves without further manipulation,and are moved a greater or less distance.

A loose pulley l2 is provided, mounted on a separate shaft E2 E, asshown in Fig. l, for the purpose of holding the belt and allowing thedrivingshaft to operate when the belt is released from thedriving-pulley l.

The operation of the present invention will be apparent from theforegoing description. Yhen it is desired to readj ust the balance ofthe machine for any reason, the belt of the machine is thrown onto theloose pulley P2, the upper section A of thepulverizing-cyl inder israised, as shown in Fig. 2, the nuts of the bearings B2 are unscrewed,slackened, and the shaft E raised from its bearings by moving the leverD, as shown in f2, and supported so that it can turn freely on thefrietiol1rollers nlr m. The weights p p' are moved in their grooves tosuch a position that there shall be just as much weight on one side. ofthe driving-shaft, at every point, as there is on the other; or, inother words, the center of gravity is again brought to correspond withthe center of rotation. The shaft is then lowered into its bearings byturning the lever D:l back to its original position and the cylinderclosed.

Figs. G, v7, and S show methods of arranging the bearings in which theshaft E rotates, so as to facilitate the operation of balancing.

Fig. t3 shows a form of bearing in which two pivoted screw-bolts areused, which hold a curved strap which covers the bearing. In this view Brepresents the bracket and the bearing proper, f:3 f3 two lugs on eitherside of the bearing, to which the screw-bolts j are pivoted by thepivots f2 f5, and ff are the nuts that screw down on the bolts. Thestrap f4 terminates at one end in an open lug f7 and at the other in aperforated ear, through which the bolts ff pass, and which serve to holdthe strap in place when the nuts are screwed down. Fig. (i shows thestrap f held down by the nuts, and orepresents the space through whichthe shaft E passes. When it is desired to release the shaft from itsbearings, it is only necessary to slacken the nuts f f on the bolts fj'. The left'hand bolt will then drop out of the open lug and fall onits pivot in the lugf, and the strap fi may then be lifted upon thehinge formed by the right-hand pivoted bolt.

'Figs (i and are respectively side and front views of aslightly-modified form of bearing. Here the strap j is hinged orpivotedat f2 to the lugsf'"S in the bearing B at one side-the let`t-l1andside-as shown in the views, and an open lugfl, with a pivoted bolt f,secured by the nut f', and hinged by the pivot]T5 inthe lug f, used atthe other end as before. The interior collar f8, pivoted at the pointf",is provided for holding the shaft in position. The method of opening andclosing this form of bearing is substantially the same as before.

l claim as my inventionl. In a pulverizing-machine, the combination,with the drivingshaft provided with radial arms carrying rotary beaters,of a driv ing-pullcyon said shaft outside of the pulverizing-chamber,containing in its interior movable counterpoises arranged to be adjustedat any desired position for balancing the driving'shaft and thepulverizing mechanisln.

2. In a pulverizing-maehine, the combination, with the driving-shaftprovided with ra- IOO dial arms carrying rotary beaters, of a driv-`ing-pulley containing in its interior sliding Weights, and means,substantially as described, for sliding said Weights from the outside ofthe pulley for balancing the driving-shaft and the pulverizing`mechanism.

3. In a pulverizingmachine, the combination, with the drivingshaft E, ofthe drivingpulley P on said shaft, the flange I, cast in one piece withsaid pulley, the Weights p p', sliding in the Webs p3 p4 in said flange,and the screwsp, passing through screw-threaded openings in the Weightsand through openings in the flange P', and the screw-heads p for turningsaid screw.

c 4L. In a pulverizi11g-machine, the combination, with the maindriving-shaftof the machine and its bearings at each end of and outsideof the pulverizing-ehamber, of movable frietion-bearings for supportingthe drivingshaft when released from its bearings during the operation ofbalancing.

5. In a pulverizing-machine, the combination, With the maindriving-shaft of the machine and its bearings at each end of and ontside-ofv the pulrerizing-chamber, of the vertically-movable friction-wheelsmounted on a vertical standard, and an arrangement of connected levers,substantially as described, for raising said standards simultaneouslyand equally and for supporting the drivingshaft on the friction-Wheelsduring` the operation.

of balancing'.

6. In a pulveriZing-machinetthe combination, with the main driving-shaftat either end of and outside of the pulverizing-ehamber, of thestandards D D, with the friction.- rollers for supporting,` the shaftduring the operation of balancing, the stationary beveled collars 'D'and the loose collars D2, surrounding the base of the standards, thelink d', connecting` the collars D2 D2, and the lever D3, whereby thecollars D2D2 are rotated and the standards raised so that the shaft issupported on the friction-rollers.'

7. In a pulveriZing-maehine, the combination, With the driving-pulley,of a loose pulley mounted on and rotating upon a separate shaft forreceiving the driving-belt during the operation of balancing thedriving-shaft of the machine. l

In testimony that I claim the foregoing as my invention I have signed myname, in presence of two Witnesses, this 29th day of June, 1888.

JOHN J. BORDMAN.

Witnesses:

TILLARD PARKER BUTLER, EDWIN T. RICE, .I r.

